Lamp-socket.



0. J. KLEIN.

LAMP BOOKET. APPLIOATION FILED sum. 14, 1908.

- Patented Sept. 10, 1912.

2 SHEETS-SHEET 1.

C. J. KLEIN.

LAMP SOCKET. urmonzon FILED SIP-P1214, 1908.

1,038,151. Patented Se t. 10,1912.

2 BHBETB-BEEET 2.

HI I v Z .4 55 5fij Z6 3 is a sliding operating 25 bodying one form thereof.

Jamil i CHARLES J. KLEIN, F MILWAUKEE, WISCONSIN, ASSIGNOR TO THE GUllLER-HATJINLER MPG. 60., Old MILKUAUKEE,WISCONSIN, A CORPORATION 01E WISCONSIN.

LAMP-SOCKET.

Patented se t. in, rate.

f ,3@,]l5}1 specification of Letters Patent.

Application filed September la, 1908. Serial No. 452,883.

To all whom it concern:

lie it ltnowu that I, Cannons J. KLEIN, a citizen of the Uhitdt States, residing at Mil waulzee, in the county of Milwaukee and a State of l fisconsin, have invented new and useful improvements in Lamp-Sockets, of which the following is a full, clear, concise, and exact description, reference being had to the accompanying drawing, forming a to part. of this specification.

invention relates to improvements in lamp sockets and more particularly to a switch operating mechanism therefor.

My invention has for its object to provide member which may be moved in the same direction to both open and close the switch.

A. further object of my invention is to provide a simple and durable switch operatso ing mechanism which may be actuated by a .pull chain to both open and close the switch. i In order that my invention may be thoroughly understood I have illustrated, in the accompanying drawings, a lamp socket em- (l't course, my

invention is susceptible of various modifica tions.

In the accompanying drawings-Figure 1 longitudinal sectional view through the ac lamp socket. Fig. 2 is an elevation of a p0rtion of the socket. Fig". 3 is a sectional view taken on line Fig. 1. Fig. & is a sec tional View taken on line l4l, Fig. 1. Fig. 5 is a sectional view taken on line 5 5,

35 Fig. 1. Fig. 6 is a sectional view taken on line 6--6,l ig. 3, and Figs. 7, 8 and 9 are detail. views of parts of the socket.

The several parts of the mechanism shown are inclosed in a casing 1 ot'conventional to type, which is provided with a tubular chain guide 2. lllounted within the casing'l is an insulating base 3, preferably formed in two parts, which are secured together in I the manner hereinafter described. Secured is to and depending from the insulating base 3 so nal piece 6. The screw 5 is turned to draw the terminal piece 6 firmly into engagement with the shell 4.- to electrically connect. the same. The terminal member 6 is provided with an upturned portion which pro1ects intoa recess 7 formed in the insulating base 3. A groove 8 extending the entire length of the insulating base 3 and terminating in therecess 7 provides a pocketfor one conductor of the electric circuit. This conductor is adapted to be secured and electrically connected to the terminal 6 bya bindlug-screw 9. interposed bet-ween the base 3 and the casing 1 is an insulating shell 13 which effectually insulates the conductor.

and terminal (3 from the casing. The shell lis connected at another point to the insulating base 3 by a bolt 10 which extends through both parts of the insulating base 3, thus securing the parts of the insulating base together, as well as securing the shell thereto. The two partsot' the insulating base'S are secured together at another point by a bolt 12. (See Fig. 6). The head of the bolt 12 and also the nut at the opposite end of the bolt are preferably counter-sunk in the insulating base. levolubly mounted in the insulating base 3 is a spindle 1a which has bearings in the two parts of said base. Rigidly mounted on the spindle 1% at substantially the center of the socket is a ratchet wheel 15 which fits in a recess 16 provided in the lower portion of the base 3. The recess 1 0 is of sutlicient width to permit the ratchet wheel to revolve freely therein, but prevents lateral movementthoreoit, and, consquently, prevents longitudinal move ment ot-the spindle l t. this end of the spindle 14: projects into a recess 17 formed in the base 3: The sidesot the recess 17 are so formed as to produce a series of curved surfaces l8. 19, 20 and 21, eccentric to the spindle 14;. llach of these curved surfaces is terminated abruptly for the purpose hereinafter described. Atits end the spindle it is preferably provided with an enlarged bifurcated portion 22 into which is fitted a spring contact 23. The contact 28 is preferably tormcd of a spring metal bent into a substantially S-shape. interposed between the spring contact 223 and the spindle 14- are strips of insulation and 26. The ends of the spring contact 23 are adapted to simul- 29 to the terminal 30 which is arranged within the threaded-shell 4. The curved surface 181s covered with a conducting strip 31 which is preferably of the form illustrated in Fig. 8. The strip 31 is provided with an extension 32 which is secured to the insulating base 3 by screw 34. (See Fig. 2.) The end of the extension 32 is preferably bent into a recess'33 in the base 3 and is provided with a binding-post 35 adapted to, electrically connect the same to the other conductor of the supply circuit. The upper portion of the insulating base 3 is provided with a slot 37 extending the entire width thereof and disposed at right-angles to the spindle 14. The slot 37 is arranged substantially in alinement with the chain guide 2. blollnted within the slot 37 and arranged to move longitudinally therein, is a sliding rack member 38 preferably of the shape shown in Fig. 7. The rack member 38 is provided with a series of teeth 39 adapted to engage the teeth on the ratchet wheel 15. Interposed between the rear wall of the slot 37 and the rack member 38 is a spring 40 which tends to cause the teeth 39 on said member to engage the teeth on said ratchet wheel. One end of the member 38 is provided with a slot 41 adapted to receive one of the connecting links of a ball chain 42 in the manner shown'in Fig. 7. Vith this arrangement the chain may be readily attached to and detached from the rack member. Furthermore, the chain may be connected to the rack member at any point to give 'the required length. Surrounding the chain 42 is a coil spring 13, one end of which is arranged to bear against the end of the member 38, while its opposite end'is arranged to bear against a plate 41 secured in the base 3. chain 4C2 passes through the plate Mandthe tubular guide 2. Of course the chain maybe any preferred type. The spring 43 tends to move the rack member 38 to the position illustrated in Fig. 1. With this arrangement when a pull is exerted upon the chain 42 the rack member 38 is drawn forward against the action of the spring 43, During its forward movement, the teeth on the rack member 38 engage the teeth on; the ratchet wheel 15 and cause the same to rotate, thereby rotating the spindle 1 1. Rotation of the spindle 14 causes the spring The.

contact 23 to alternately make and break contact between the contacts 27 and 31. Assuming thatthe spring contact 23 is in the position illustrated in Fig. 2, if the rack member is pulled forward it will cause the spring contact 23 to fly out of engagement with the surfaces 21 and 19 and into engagement with the contacts 27 and 31. This results in closing the circuit of the lamp. If now the chain 42 is released the spring 43 will force the rack member back to its former position. In moving back to its former position the springAO permits the rack member to slide over the teeth of the ratchet wheel without imparting any movement thereto. If a pull is again exerted on the chain 42, the rack member will again be moved forward and actuate the ratchet wheel 15 and spindle 14 to cause the spring contact 23 to fly out of engagement with the contacts 27 and '31 and into engagement with the surfaces 19 and 21, thereby opening the circuit.

Of course other forms of switches than that illustrated may be nscdwith my pull chain mechanism without departing from the spirit of my invention. Furthermore, it should be understood that while I have shown a pull. chain for operating the sliding rack member, the same might be operated by pressure.

Having thus described my invention, what 'I claim as new and desire to secure by Letters Patent is:

1. The combination with a switch, of a toothed wheel movable therewith, a rigid toothed rack adapted, when moved in one direction, to engage and operate said toothed wheel, and, when moved in the opposite direction, to ride over said toothed wheel without operating the same. and means biasing said rack in the latter direction.

2. In combination, a rotary ,switch rotatable in the-same direction to both open and close and being selflocking in both positions against movement in the opposite direction and operating means therefor comprising a toothed wheel and a cooperating rigid rack member reciprocal successively 1n the same direction to both open and close said switch.

3. In a lamp socket, in combination, an insulating base, a spindle revolubly mounted therein and carrying a switch member, a toothed wheel fixed to said spindle, a toothed rack .member'slidable longitudinally in a recess in said base, the walls. of said recess forming a guideway for said member means for yieldingly holding the toothed portion of said member in engagementwith the teeth on said wheel,-the teeth on said wheel and said member being so constructed that when said member is moved in one direction, its teeth will engage the teeth on next; adjacent surface, contact plates secured tion, and a flexible -chain for moving said 1.0 to cert-aimof said curved surfaces, e. toothed raclrmember in the former, direction.

Wheel connected to said Contact member, 'a In Witness whereof, I have hereunto subtoet-hed rack member, said rack member bescribed my name in the presence of two Witing moved in one direction to engage the nesses. teeth of said Wheel to revolve the same, and CHARLES J. KLET N. being movable in the opposite direction Witnesses: Without revolving said wheel, acoil spring A. C. MAAGE, biasing said-rack member in the latter direc- H. LEWIS. 

